DMA_FF_UNDERFLOW_MASK  750 drivers/video/fbdev/mmp/hw/mmp_ctrl.h #define	 DMA_FF_UNDERFLOW_MASK		0x20000000
DMA_FF_UNDERFLOW_MASK  442 drivers/video/fbdev/pxa168fb.h #define     DMA_FF_UNDERFLOW_MASK		0x20000000